Chistopol Watch Factory
Vostok
Precision
Description
In 1957, the Chistopol Watch Factory began production of the high-precision K-28 watch under the Vostok brand. This model featured a small seconds hand and a non-shock-protected balance, and was powered by caliber 2802. The movement was based on the Zenith 135 caliber, which had a distinctive lateral minute-pinion construction not found in any other movement.
Case
Dial
Movement
The 5NKh-1M watch movement measures 28 mm in diameter and features a steel lever escapement with 21 ruby jewels. The running time from a full wind is no less than 46 hours. The average daily rate in each of the four positions ranges from -5 to +10 seconds. In addition to the standard assessment based on average daily rate, the watch was also subject to further precision requirements, including temperature coefficient, mean variation, rate recovery, and other parameters.
Strap
Complications
Catalog References